1993 Jaguar XJ6 Jaguar 1993 problem with starting the engin

MANUEL11

MEMBER
1993 JAGUAR XJ6
6 CYL
2WD
AUTOMATIC
119,000 MILES

I have a great jaguar 1993 XJ6 has 119 K miles. The car sometimes starts fine from the first click. Sometimes it starts after 5 to 10 times. I changed fuel pump, fuel filter, spark plugs, ignition coil, distributor and its cap, spark plug wires. Same problem? What should I do more? Please help. Thanks

Tuesday, April 7th, 2009 AT 8:29 PM

3 Replies

JAMES W.

MECHANIC
2,394 POSTS

First question, when was your last tuneup? If this isn't an issue, you need to check your fuel pressure at the rail. When you turn the key to "on", it should jump up to about 44 lbs. If it takes 2 or 3 key on/off cycles to build this pressure, your fuel pump or fuel pressure regulator is bad. If the pressure builds quickly but also drops quickly when key is off, it's the regulator.

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Wednesday, April 8th, 2009 AT 8:40 PM

MANUEL11

MEMBER
4 POSTS

Thanks for your kind reply

i made tune up recently. Also changed the fuel pump anf fuel filter. I do agree with you regarding the fuel pressure regulator.

How can I measure it? Tools? Location (i think it is on the top of the engine?

Thanks

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Monday, April 13th, 2009 AT 4:13 AM

JAMES W.

MECHANIC
2,394 POSTS

There should be a pressure tap on the fuel rail for checking pressure. You'll need to get a gauge that will attach to thios tap. If everything is normal, you should get a pressure reading of 43.5 lbs with key on, or on engine crank.